Enameling cradle



A. F. BROTZ ENAMELING CRADLE Filed sept. 25, 1927 3 Sheets 1 WITNESSES May l5, 1928. 1,669,587

A. F. BRoTz ENAMELING CRADLE Filed Sept. 23. 1927 3 Sheets-Sheet .2

FIG. 2

ATTORNEY l l Patented May 15, 1928,

UNITED STATES PATENT OFFICE.

ANTON FRANK BROTZ, OF KOHLER, WISCONSIN, ASSIGNOR TO KOHLEROOMIANY, Oil' KHLER, WISCONSIN, A CORPORATION JOF WISCONSIN.

ENAMELING CRADLE.

Application led September 23, 1927. Serial No. 221,537. E

This invention relates to enameling cradles for use in enamelmg plumbing ware and the like, such as porcelain lined sinks,

lavatories and bathtubs, and has for its ob-' ject to provide a cradle having means for heating the articles so as to avoid the necessity for returning it to the oven during the operation of applying the enamel.

Another object of the invention is to provide such a heated cradle capable of the tilting and turning movements that are necessary for applying the enamel.

Another object ot' the invention is to provide such a heated cradle capable of supporting the article without contacting with the surface to be enameled and of facilitating the placing and removal of the article.

With the above and other objects in View the invention consists in the enameling cradle as herein claimed, its parts and combinations ot parts and all equivalents.

Referring to the accompanying drawings in which like characters of reference indicate the same parts in different views,

F ig. 1 is a side View of an enameling cradle constructed in accordance with the present invention; n Y

Fig. 2 is a transverse sectional view there of showing a tilted position in dotted lines;

Fig. 3 is a plan view of the cradle;

Fig. 4 is an end view thereof;

Fig. 5 is a detail sectional view of one of the burners; Y

F ig. 6 is a sectional view on the plane of line 6--6 of Fig. 2 yshowing the swivel connection for the gas inlet and Fig. 7 is a similar viewy on the plane of line 7-7 of Fig. 2 showing the swivel connection for the air inlet. v

In these drawings 10 indicates a cradle truck mounted on wheels or rollers to be capable of movement. At its ends are trunnion bearings 11 for the oifset trunniens of an underslung cradle frame 12 which has a pivot bearing 13 in which the pivot post 14 of a cradle is mounted to rotate `or oscillate.

In order to receive such movements thepivot post 14 is provided with a gear wheel 15 meshing with a pinion 16 on the shaft of an electric motor 17 which is carried by a subframe 18 attached to the cradle framev 12 and swinging therewith. A hand lever 19 is secured to one of the trunnions of the cradle frame 12 for tilting it, and a wiring conduit 2,0 for the motor is taken out through the other trunnion. l

Mounted on the enlarged head of pivot post 14 is the cradle member v21 consisting of a shell or casing shaped to fit the article yto be enameled, in'this instance a sink 22.

The casing or shell is lined with a `heavy heat insulating lining 23 of firebrick or other suitable material and in its horizontal part it is provided with vertical supporting pins 24 to engage within the rim of the sink and beneath the bottom of the sink, while. in its vertical upstanding back part it is provided with horizontal supporting pins'25 to engage the sink back. When the sink is supported in this manner, its edges match withvthe edges of the cradle casing 21 but are slightly spaced therefrom to per mit the discharge of the burnt gases.

Embedded in the'heat insulating lining 23 at the bottom and at ythe back of the cradle are burners, one of which is `shown in detail ink Fig. 5, consisting of an air tube 26 containing a v,central gas pipe 27 on the end of which. is -adjustably threaded a burner tip 28 having an enlarged hollow head with a conical .neck portion adapted in the adjustments, effected by the turning of the tip by means of a tool slot 29 in itsl end, to vary lthe area of the air discharge port 30 between said head 'and the end of the air tube. Vhilethe'burner tip has a working tit Within the tube 26 its bearing surface lluted to provide air passageways 81around it leading to the circular air port and the hollow head has radiating inclined ygas ports 32 to discharge gas into the current of air from the air port.

These burners are arranged 1n rows extending transversely across the cradle alongy an airy header 34 at thefjunction of the vertical section withy the horizontal section. Each ot the pipes 27 yot a row of burners passes ont through. the air pipe coupling and connects with a gas pipe 35 correspondingy with the air header 36.

The air and gas headers 84 and 36 conpipe and joining with a gas iiect with air and gas feed pipes `37' and 38 respectively, which lead from passageivays 39 and ll0 in the enlarged head ol the 'pivot post ll, which passageways extend through said pivot post 'from points beneath the cradle traine ll Air and gas under pres sure are supplied tothe passageways 39 and. 4:0 respectively through hollow rings 4l and l2 loosely mounted on the pivot pest lt' and suitably packed to permit the post to turn therein, and having nipples lf3 `and allor to the ovena numberof tiinesduring the process of enameling, as heretofore, and

connection with flexible air and gas hose, not shown. "The cradle may thus be turned or tilted Without interfering with the air and gas connections for the burners.

" At one end of the `cradle the insulating lining is interrupted and Van opening is` i termed inthe casing vvhieliis controlled by a door Ll5 mounted lipon a shalt i6 k)our` nalled in bearings on the casing and turned by al hand lever 47.

ing `the sink to and from the oven may be `entered through the doorway for placing depositedthereon in powdered form and y will be` kept at the required enamel `fusing temperature throughout the enanielin-g operation, making it `unnecessalry`to return it effecting a great saving in time and labor.

The turning and tilting of the cradle are y necessary to permit the enamel to be de "posited upon all exposed surfaces and are heating y by Letters Patent is:

accomplished without interfering With the connections.` By

and gasiiiay be obtained "tor proper heating at the various partso't the cradle according to the requirements otthe article, so that all parts ol the article `are"maintained at the enaiiieliiig temperature throughout the i enaineling operation, and the entire enamel-4 ing operation is completed without inter ruption lor reheating,aslieretotore that l claim as new and desire to secure l. An eiiaineling cradle, comprising a "cradle member, y a heat insulating lining therefor, and means for supplying heat Within the cradle during the enaineling operation. i

2.`An ename-ling cradle, comprisin a cradle member, supports therein for hol ing the `article to he enameled, a heat insulating y When this door isv opened the usual enameling forli for conveylining for the cradle, and means for supplying heat Within the cradle to heat the article duringthe enameling operation.

3. An enameling cradle, comprising a cradle member shaped te lit the article to be enameled, supportsivithin thecradle tor holding the article in close fitting but spaced relation from the edges of the cradle,` and means tor heating the cradle during the enaiiieling operation. y

4f. irii `enameling, cradle,y comprising a. turning and tilting cradle member shaped the article in spaced relation with the edges of the cradle member, a heat insulating lin- `ing` lor the cradle `member, `arid burners "to lit the" article to be enanielerhfsupporting pins within the cradle member for holding member shaped to lit the edges ol the ar# ticle, supporting pins in the cradle member ior engaging the article beneath the roll rims and supporting itin spaced relation with the edges of the cradle member, a heat" i insulating lining ior thecradle member, and" heating means within `the cradle vmember for heating the operation.

6. An enameling cradle for "enameling sinks and: the like havixll roll rims, comprisi4 ing a cradle member mounted to tin-n and tilt, supporting pins in the cradle .member engaging beneath .the rims of the article for holding it in place duringthe movement of the cradle member, and means Within the article during the Veiialnelfiiig cradle member for heating thearticle during the enameling operation; y i

7. An enameling cradlefor sinks and the like having roll rims,` a cradle" member mountedto turn and tilt and shaped to lit the article to lbe enameled, supporting pins inthe cradle meinberengaging beneathftlie y i y `roll rims of the article tosupport the article adjusting the` `burner tips, thedesired propcrtionsof air 8. An enameling cradle for` sinks'aiidthe like, comprising awcradle memberl having walls adapted to lit'the edges of the article tobe. enameled, supporting means Withinthe cradle 'for supporting the artielefmeans for yheating the cradle member i during the enameling operation, and a` door in the Wall of the cradle member for admitting an enameling fork to lift the article" from the Vsupporting means.

9. An enamelingcradle for sinks-andthe like having roll rims, comprising a turning and tilting cradle rmember having Walls to- 'f'it the edges ofthe articleto beV enameled,V

supporting pins within the cradle member for engaging beneath the rim of the article and for supporting the article in the various positions or' the cradle member, means for heating the cradle member during the enanieling operation, and a door in the Wall of the cradle member lor admitting an enameling fork tor lifting the article oil of the supporting pins.

10. An enameling cradle, comprising a cradle member, means for supporting an article therein, a heat insulating lining for the cradle member, and gas burners embedded in the lining comprising air tub-es, gas pipes Within the air tubes, and burner tips threaded on the ends of the gas pipes and having nozzle heads adjustable With relation to the ends of the air tubes for varying the air HOW.

11. An enameling cradle, comprising a cradle member for supporting an article to be enameled, a heat insulating lining therefor and gas burners embedded in the heat insulated lining 'for heating the article during the enameling operation and comprising air tubes, gas pipes therein, and burner tips fitting Within the air tubes and adjustably threaded on the gas pipes and fluted to provide air passageways between them and the air tubes, said burner tips having hollow heads With inclined gas ports and conical neck portions forming air ports With the ends of the tubes varied by the adjustments ot' the burner tips.

12. An enameling cradle for sinks and the like comprising a turning and tilting cradle member shaped to lit the sink rim and the sink back, supporting pins in the cradle member engaging beneath the rim of the sink and against the back of the sink for holding the edges of the sink in spaced relation with the edges of the cradle member and for supporting the sink in the different positions of the cradle member, rows of gas burners eX- tending across the bottoni and up the back o the cradle member, each gas burner having an air tube and a gas pipe, air supply pipes connected With the air tubes of each row of burners, gas supply pipes connected with the gas pipes of each row of burners, air and gas headers connecting the air and gas supply pipes respectively, a suitably mounted pivot post supporting the cradle member and having passageways connected With said air and gas headers, hollow rings looselyy mounted on the pivot post and communicating with said air and gas passageways, and hose connections on said hollow rings.

13. An enameling cradle, comprising a support, a cradle frame having offset trunnions by which it is mounted in the support and capable of being tilted, a pivot post having a bearing in the cradle frame, a gear Wheel mounted on the pivot post, an electric motor on the cradle frame, a pinion on the motor shaft engaging the gear Wheel, a cradle member mounted on the pivot post and adapted to support the article to be enameled, gas burners Within the cradle member having air and gas connections eX- tending through the pivot post, and swivelled hose couplings on the pivot post for the air and gas connections -for permitting .of the turning and tilting movement of the cradle member Without interfering with the air and gas supply.

In testimony whereof, I aflix my signature.

ANTON FRANK BROTZ. 

